A superchat cited this passage sarcastically to say Muhammad appears in the Bible as the one preaching 'another gospel,' i.e. as a false teacher rather than a true prophet.
Scripture spotlight
Galatians 1:6-9
bible
6 I marvel that you are so quickly deserting him who called you in the grace of Christ to a different gospel; 7 and there isn't another gospel. Only there are some who trouble you, and want to pervert the Gospel of Christ. 8 But even though we, or an angel from heaven, should preach to you any gospel other than that which we preached to you, let him be cursed. 9 As we have said before, so I now say again: if any man preaches to you any gospel other than that which you received, let him be cursed.
Invoked in paraphrase ('if anyone preaches another gospel, let him be accursed') to argue that the apostolic message was one gospel, not a different later message.
The host quoted Paul's warning about 'another gospel' to argue that Mormon polytheism presents a different gospel and therefore cannot save.